pDetails are given of the n.m.r. spectra of mycobactins F, H, M, N, P, S and T, and resonances are ascribed to all the protons in these molecules. A simplified system is described for identifying known mycobactins by the n.m.r. spectrum alone. This method will not distinguish mycobactins S and T, whose nuclei differ only in the configuration at an asymmetric centre./p
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